Vulnerability Description
On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated before use, an attacker can modify the boot header stored on an SD card so that a secure image appears to be unencrypted, and they will be able to modify the full range of register initialization values. Normally, these registers will be restricted when booting securely. Of importance to this attack are two registers that control the SD card's transfer type and transfer size. These registers could be modified a way that causes a buffer overflow in the ROM.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Amd | Xilinx Z-7012S Firmware | - |
| Amd | Xilinx Z-7012S | - |
| Amd | Xilinx Z-7014S Firmware | - |
| Amd | Xilinx Z-7014S | - |
| Amd | Xilinx Z-7010 Firmware | - |
| Amd | Xilinx Z-7010 | - |
| Amd | Xilinx Z-7015 Firmware | - |
| Amd | Xilinx Z-7015 | - |
| Amd | Xilinx Z-7020 Firmware | - |
| Amd | Xilinx Z-7020 | - |
| Amd | Xilinx Z-7030 Firmware | - |
| Amd | Xilinx Z-7030 | - |
| Amd | Xilinx Z-7035 Firmware | - |
| Amd | Xilinx Z-7035 | - |
| Amd | Xilinx Z-7045 Firmware | - |
| Amd | Xilinx Z-7045 | - |
| Amd | Xilinx Z-7100 Firmware | - |
| Amd | Xilinx Z-7100 | - |
| Amd | Xilinx Z-7007S Firmware | - |
| Amd | Xilinx Z-7007S | - |
Related Weaknesses (CWE)
References
- https://support.xilinx.com/s/article/47915Vendor Advisory
- https://support.xilinx.com/s/article/76964Vendor Advisory
- https://support.xilinx.com/s/article/47915Vendor Advisory
- https://support.xilinx.com/s/article/76964Vendor Advisory
FAQ
What is CVE-2021-44850?
CVE-2021-44850 is a vulnerability with a CVSS score of 6.8 (MEDIUM). On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated ...
How severe is CVE-2021-44850?
CVE-2021-44850 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-44850?
Check the references section above for vendor advisories and patch information. Affected products include: Amd Xilinx Z-7012S Firmware, Amd Xilinx Z-7012S, Amd Xilinx Z-7014S Firmware, Amd Xilinx Z-7014S, Amd Xilinx Z-7010 Firmware.